error with modprobe hostap_cs

[o.terzo]

i try to use a netgear MA401 with hosap driver 0.2.0 and the kernel is 2.6
when i execute this command i have this message

[root at localhost hostap-driver-0.1.3]# modprobe hostap_cs
FATAL: Error inserting hostap_cs
(/lib/modules/2.6.4-1.275/kernel/drivers/net/wireless/hostap_cs.ko): Unknown
symbol in module, or unknown parameter (see dmesg)

in dsmesg
hostap_cs: Unknown symbol prism2_update_comms_qual
hostap_cs: Unknown symbol hostap_set_hostapd
hostap_cs: Unknown symbol hostap_set_encryption
hostap_cs: Unknown symbol hostap_remove_proc
hostap_cs: Unknown symbol hostap_set_auth_algs
hostap_cs: Unknown symbol hostap_80211_get_hdrlen
hostap_cs: Unknown symbol hostap_set_multicast_list_queue